diff --git a/plugins/USBPrinting/USBPrinterManager.py b/plugins/USBPrinting/USBPrinterManager.py
index 5982196cb8..57499b9a47 100644
--- a/plugins/USBPrinting/USBPrinterManager.py
+++ b/plugins/USBPrinting/USBPrinterManager.py
@@ -132,12 +132,15 @@ class USBPrinterManager(QObject, SignalEmitter, OutputDevicePlugin, Extension):
         return USBPrinterManager._instance
 
     def _getDefaultFirmwareName(self):
-        machine_type = Application.getInstance().getMachineManager().getActiveMachineInstance().getMachineDefinition().getId()
+        machine_instance = Application.getInstance().getMachineManager().getActiveMachineInstance()
+        machine_type = machine_instance.getMachineDefinition().getId()
         baudrate = 250000
         if sys.platform.startswith("linux"):
                 baudrate = 115200
         if machine_type == "ultimaker_original":
             firmware_name = "MarlinUltimaker"
+            if machine_instance.getMachineSettingValue("machine_heated_bed"): #Has heated bed upgrade kit?
+                firmware_name += "-HBK"
             firmware_name += "-%d" % (baudrate)
             return firmware_name + ".hex"
         elif machine_type == "ultimaker_original_plus":